Pick out the wrong statement.
(A) The X-rays cannot be deflected by electric field unlike cathode rays (B) The intensity of X-rays can be measured by ionisation current produced due to the ionisation of gas by X-rays
(C) The quality of X-rays can be controlled by varying the anode-cathode voltage
(D) Crystal structure of a material can be studied by an electron microscope

1 Answer

Answer :

(C) The quality of X-rays can be controlled by varying the anode-cathode voltage

Related questions

Description : Particle nature of cathode rays is proved due to the fact that they (A) Travel in a straight line (B) Get deflected by magnetic electric field (C) Produce fluorescence (D) Heat the exposed material

Last Answer : Option B

Description : The component labeled 'CR1' in the circuit shown in the illustration __________________. EL-0085 A. varies its anode/cathode polarity depending on 'RL' current B. rectifies the varying voltage from the ... reactance to smooth ripple D. establishes a constant reference voltage for the base of 'Q1'

Last Answer : Answer: D

Description : Electronic structure of a material is generally studied by (A) Metallurgical microscope (B) Electron diffraction (C) Spectroscopic techniques (D) X-ray

Last Answer : (C) Spectroscopic techniques

Description : Alpha rays are different from beta rays in one of the following ways. Are they different since: w) alpha rays are deflected in a magnetic field and beta rays are not x) alpha rays are ... negative charge z) alpha rays are produced within the nucleus and beta rays are produced outside the nucleus 

Last Answer : ANSWER: Y -- ALPHA RAYS HAVE A POSITIVE CHARGE AND BETA RAYS HAVE A NEGATIVE CHARGE

Description : Pick out the wrong statement about coating/electroplating of metals. (A) Phosphate coating is used as an excellent base for paints & enamels (B) Phosphate coating is less corrosion resistant than ... coating metal is made the anode (D) Calorising is the process of coating steel with chromium

Last Answer : (D) Calorising is the process of coating steel with chromium

Description : The internal structure of crystals was first studied with which of the following? w) x-rays x) isotopes y) electron microscopes z) lasers

Last Answer : ANSWER: W -- X-RAYS

Description : Caustic soda is produced in a mercury cell having anode and cathode made respectively of moving mercury and (A) Moving mercury and graphite (B) Graphite and moving mercury (C) Moving mercury and carbon (D) Moving mercury and crimped steel wire

Last Answer : (B) Graphite and moving mercury

Description : __________ is used for examining the macro-structure of a material. (A) Metallurgical microscope (B) Optical microscope (C) X-rays (D) Visual inspection by naked eye

Last Answer : (D) Visual inspection by naked eye

Description : A squid axon is placed on stimulating electrodes, and an intracellular electrode is inserted and connected through a cathode-ray oscilloscope (CRO) to an indifferent electrode. When the axon is stimulated, the latent ... . 40 m/s d. 67.5 m/s e. This cannot be determined from the information given

Last Answer : 30 m/s

Description : Pick out the wrong statement. (A) Metal/alloys having hexagonal crystal lattice structure are less malleable than those having cubic crystal lattice structure (B) Metal/alloys having body centred cubic ... D) Both ferritic & austenitic stainless steel has a face centred cubic (fcc) crystal structure

Last Answer : (C) Tungsten has a body centred cubic (bcc) crystal lattice structure

Description : Identify the correct statement with reference to the extractive metallurgy of aluminium. (A) The electrolyte consists of molten Na3AlF6 with approximately 1 to 8% Al2O3 (B) Approximately 80% of ... is immediately vaporised (D) Anode effect sets in when the cryolite concentration goes below 40%.

Last Answer : (A) The electrolyte consists of molten Na3AlF6 with approximately 1 to 8% Al2O3

Description : An ELECTRON moving horizontally along the +x axis enters a region of space with a horizontal uniform magnetic field pointing in the +y direction. The electron will be deflected: w) -y direction x) +y direction y) -z direction z) +z direction

Last Answer : ANSWER: Y -- -Z DIRECTION

Description : The electric field applied in vertical directional to the cathode rays moving horizontally deflect them in __________

Last Answer : The electric field applied in vertical directional to the cathode rays moving horizontally deflect them in __________ ... a) and (b) D. None of these

Description : The voltage developed by an AC generator is controlled by varying the ____________. A. speed of the prime mover B. AC excitation to the field C. DC excitation to the field D. DC excitation of the voltage regulator

Last Answer : Answer: C

Description : In an AC synchronous motor electric propulsion plant, propeller speed is controlled by varying the _____________. A. prime mover speed B. electric coupling field strength C. number of energized main motor poles D. propulsion generator field strength

Last Answer : Answer: A

Description : Pick out the wrong statement. Raoult's law does not apply, when the (A) Size of component molecules are not equal (B) Attractive forces between like and unlike molecules ... D) Chemical combination or molecular association between unlike molecules takes place in the formation of solution

Last Answer : (C) Component molecules are non-polar

Description : It is an unidirectional device that blocks the current flow from cathode to anode   (A) SCR (B) PCR (C) VCR (D) DCR

Last Answer : It is an unidirectional device that blocks the current flow from cathode to anode SCR 

Description : Pick out the wrong statement. (A) 'Green acid' is the other name of phosphoric acid produced by the reaction of phosphate rock & sulphuric acid (B) Chemically unreactive nature of ... in the manufacture of safety matches, is converted into white phosphorous by vaporisation followed by condensation

Last Answer : (C) Red phosphorous is the most reactive allotropic form of phosphorous

Description : Pick out the wrong statement. (A) Polymeric fibres are never produced by addition polymerisation (B) Property of tackiness is exhibited by uncured rubber (C) Sharp melting point is not observed in thermoplastic polymers (D) Polythene generally has an excellent resistance to ultra violet rays

Last Answer : (A) Polymeric fibres are never produced by addition polymerisation

Description : 10. Imagine that you are sitting in a chamber with your back to one wall. An electron beam, moving horizontally from back wall towards the front wall, is deflected by a strong magnetic field to your right side. What is the direction of magnetic field? -Science

Last Answer : The direction of the magnetic field can be determined using the Fleming’s Left hand rule. The direction of the magnetic field will be perpendicular to the direction of current and the direction ... it can be concluded that the direction of the magnetic field inside the chamber is downward.

Description : In the common dry cell, the zinc atoms are: w) reduced at the cathode x) oxidized at the cathode y) oxidized at the anode z) reduced at the anode

Last Answer : ANSWER: Y -- OXIDIZED AT THE ANODE

Description : What products do we get on electrolysis of saturated brine using steel cathode and graphite anode in an electrolytic cell? (A) Cl2 & Na (B) Cl2 & H2 (C) O2 & H2 (D) Cl2 , H2 & NaOH solution

Last Answer : (D) Cl2 , H2 & NaOH solution

Description : X-rays are deflected by__________.

Last Answer : X-rays are deflected by__________. A. electrical field B. magnetic field C. gravitational field D. None of these

Description : Corrosion of a metal occurs at the (a) Anode (b) Cathode (c) Both anode and cathode (d) None of the above

Last Answer : Ans:(a)

Description : (3) made cathode and a pure nickel red, the anode Explanation: Electroplating is the deposition by electrolysis of a coating of metal upon a conducting surface. The simplest system makes the object to be ... on the spoon is called reduction and, therefore, the spoon is also referred to as a cathode.

Last Answer : Which of the following is not a method of preparing oxygen? (1) Electrolysis of water (2) Fractional distillation of liquid air (3) Decomposition of potassium permanganate (4) Decomposition of manganese dioxide

Description : Electrolysis of an aqueous solution of copper sulphate using copper electrodes gives (1) Copper at eathode and oxygen at anode. (2) Copper at anode and oxygen at cathode. (3) Copper at cathode and anodes dissolve to give copper. (4) Hydrogen at cathode and oxygen at anode.

Last Answer : (1) Copper at eathode and oxygen at anode. Explanation: Copper is deposited at the cathode and is dissolved at the anode. Consequently the concentration of copper ions in solution remains constant. This can be used as a method of purification of copper as only pure copper is deposited at the cathode

Description : In electro-refining, the pure metal is deposited on – (1) vessel (2) electrolyte (3) cathode (4) anode

Last Answer : (3) cathode Explanation: In electro-refining, the anodes consist of unrefined impure metal, and as the current passes through the acidic electrolyte the anodes are corroded into the solution so ... pure metal onto the cathodes. Electrolytic refining is used to extract impurities from crude metals.

Description : The device in figure 'B' shown in the illustration will conduct when the ____________. EL-0067 A. base-emitter is forward biased and the collector-base is reverse biased B. anode-cathode is forward ... is reversed biased D. terminal 1-2 is forward biased and the emitter-terminal 1 is reverse biased

Last Answer : Answer: B

Description : The leads of the device in figure 'B' shown in the illustration are named _________. EL-0065 A. source, gate and drain B. emitter, base and collector C. emitter, base 1 and base 2 D. anode, cathode and gate

Last Answer : Answer: A

Description : Leads on the device in figure 'B' shown in the illustration are named ____________. EL-0067 A. source, gate and drain B. emitter, base and collector C. emitter, base 1 and base 2 D. anode, cathode and gate

Last Answer : Answer: D

Description : Which of the following statements comparing transistors and vacuum tubes is correct? A. Both transistors and vacuum tubes have a cathode that must be heated to give off electrons. B. A vacuum tube must ... flow. D. The anode of both transistors and vacuum tubes must be heated to give off electrons.

Last Answer : Answer: B

Description : The leads of the device in figure 'A' shown in the illustration are named the _______________. EL-0065 A. source, gate and drain B. emitter, base and collector C. emitter, base 1 and base 2 D. anode, cathode and gate

Last Answer : Answer: C

Description : The input signal of a travelling wave tube is introduced at A. Cathode B. Anode C. Cathode end of the helix D. Collector end of the helix

Last Answer : C. Cathode end of the helix

Description : Inverter cell anode and cathode of the…………. cell is used for vehicle (a) Copper electrode zinc (b)Zinc copper (c) Aluminium zinc (d)Nickel Cobalt

Last Answer : (a) Copper electrode zinc

Description : In electro-refining, the pure metal is deposited on (1) vessel (2) electrolyte (3) cathode (4) anode

Last Answer : cathode

Description : When a spoon is to be electroplated with nickel the spoon is (1) dipped in a nickel sulphate solution (2) made anode and a pure nickel rod, the cathode (3) made cathode and a pure nickel red, the anode (4) coated with nickel sulphate and dried

Last Answer : made cathode and a pure nickel red, the anode

Description : Electrolysis of an aqueous solution of copper sulphate using copper electrodes gives (1) Copper at cathode and oxygen at anode. (2) Copper at anode and oxygen at cathode. (3) Copper at cathode and anodes dissolve to give copper. (4) Hydrogen at cathode and oxygen at anode.

Last Answer : Copper at cathode and oxygen at anode.

Description : Define cathode and anode.

Last Answer : Cathode: The electrode which is connected to the negative terminal (pole) of a battery is called as cathode. It is a negative electrode.  Anode: The electrode which is connected to the positive terminal (pole) of a battery is called as anode. It is a positive electrode. 

Description : What is the difference between an anode and a cathode?

Last Answer : The anode is positively charged electrode and the cathode is negatively charged electrode.

Description : Do electrons flow from the anode to the cathode?

Last Answer : electrons flow from cathode to anode because the electron has a negative charge and repels from the negatively charged cathode whilst also attracting to the positively charged anode.

Description : Which is the positive terminal anode or cathode?

Last Answer : Anode is positive terminal and cathode is negative terminal.

Description : Is the anode or cathode longer in LED ?

Last Answer : In LED anode terminal is longer and cathode terminal is smaller.

Description : Which one of the following is used for determining the structure of crystal - (1) Gamma rays (2) X-rays (3) UV rays (4) visible light

Last Answer : (2) X-rays Explanation: Crystallography is the science that examines crystals which can be found everywhere in nature, from salt to snowflakes to gemstones.

Description : X-rays are used for the study of crystal structure because  (a) X-rays are completely absorbed by the crystal (b) the wavelength of X-ray is of the same order of magnitude in the inter ... in comparison with the inter-atomic spacing in crystals (d) the crystals are completely transparent to X-rays

Last Answer : the wavelength of X-ray is of the same order of magnitude in the inter atomic spacing in crystals 

Description : For dynamic strain measurement, the Wheatstone bridge used is of __________ type. (A) Voltage sensitive null (B) Voltage sensitive deflected (C) Current sensitive deflected (D) None of these

Last Answer : (B) Voltage sensitive deflected

Description : In a cathode ray tube, electric and magnesity of the magnetic fields are simultaneously applied at right angles to each other and the intensity of the

Last Answer : In a cathode ray tube, electric and magnesity of the magnetic fields are simultaneously applied at right angles to each ... 01 T` and `E=50,000 V//m`.

Description : 1. The anti-malarial drug Quinine is made from a plant. Which is that plant? 2. Who is entitled to initiate a Bill for Constitutional Amendments? 3. What is a strong argument for the particle ... rainfall? 20. Which was the most important kingdom after the Maury in the-Deccan and Central India?

Last Answer : Answer : 1. Cinchona 2. Either House of Parliament 3. They are cast shadow 4. The same day at 7.30 a.m. 5. Vamsathapakasini 6. Maastricht Treaty 7. Because it is acidic 8. ... 15. Cholas 16. Thermal power plants 17. Respiration 18. Constituent Assembly 19. Orographic rainfall 20. Satavahanas

Description : Assertion `(A) : beta-` particles are deflected more than `alpha-` particles in a given electric field. Reason `(R) : `Charge on `alpha-` particles is

Last Answer : Assertion `(A) : beta-` particles are deflected more than `alpha-` particles in a given electric field. ... . If both (A) and (R ) are incorrect.