For measuring emf of a standard cell we use:

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For measuring emf of a standard cell we use: Potentiometer

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The EMF of Weston standard cell is measured using

Last Answer : The EMF of Weston standard cell is measured using Potentiometer.

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For measuring a very high resistance we should use?

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The Maxwell bridge is used for measuring

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When measuring insulation resistance of cables using d.c. source, the galvanometer used should be initially

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The desirable static characteristics of a measuring system are?

Last Answer : The desirable static characteristics of a measuring system are accuracy, sensitivity and reproducibility.

A d.c. potentiometer is designed to measure up to about 2V with a slide wire of 800 mm. A standard cell of

Description : A d.c. potentiometer is designed to measure up to about 2V with a slide wire of 800 mm. A standard cell of emf 1.18V obtains balance at 600 mm. A test cell is seen to obtain balance at 680 mm. The emf0fthe test cell is  A)1.00V B)1.34V C)1.50V D)1.70V 

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While we believe that BMI is a standard in measuring the fat in our body, there is a growing ______ among scientists that it may not be the best tool to do so. (1) concord (2) consensus (3) congruous (4) confluence

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A reading of 120 is obtained when a standard inductor was connected in the circuit of a Q-meter and the

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The material used to make standard resistance is:

Last Answer : The material used to make standard resistance is: Manganin

Commonly used standard capacitor is?

Last Answer : Commonly used standard capacitor is concentric cylindrical type.

Standard resistor is made from?

Last Answer : Standard resistor is made from maganin.

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A standard steel tape of length 30 m and cross-section 15 × 1.0 mm was standardised at 25°C and at 30 kg pull. While measuring a base line at the same temperature, the pull applied was 40 kg. If the modulus of elasticity of steel tape is 2.2 × 106 kg/cm2 , the correction to be applied is (A) - 0.000909 m (B) + 0.0909 m (C) 0.000909 m (D) None of these

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This refers to a four-arm ac bridge used for measuring inductance against a standard capacitance.

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Refers to an ac bridge for measuring the inductance and Q of an inductor in terms of resistance, frequency and a standard capacitance.

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A cell of emf E and internal resistance r is connected in series with an external resistance nr. Than what will be the ratio of the terminal potential

Description : A cell of emf E and internal resistance r is connected in series with an external resistance nr. Than what will be the ratio of the terminal potential

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Find the minimum number of cells required to produce an electric current of 1.5 A through a resistance of `30 Omega`. Given that the emf of each cell

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The potential difference of a cell in an open circuit is 6 V, which falls to 4 V when a current of 2 A is drawn from the cell. Calculate the emf and t

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In potentiometer experiment, a cell of emf `1.25 V` gives balancing length of 30 cm. If the cell is replaced by another cell, then balancing length is

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The emf of a cell E is 15 V as shown in the figure with an internal resistance of `0.5Omega`. Then the value of the current drawn from the cell is

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Four identical cells of emf `epsilon` and internal resistance r are to be connected in series. Suppose, if one of the cell is connected wrongly, then

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A potentiometer wire of length `100 cm` having a resistance of `10 Omega` is connected in series with a resistance `R` and a cell of emf `2V` of negli

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A wire of length 100 cm is connected to a cell of emf 2 V and negligible internal resistance. The resistance of the wire is `3 Omega`. The additional

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A voltmeter of resistance `998 Omega` is connected across a cell of emf 2 V and internal resistance `2 Omega`. Find the p.d. across the voltmeter, tha

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A cell which has an emf `1.5` V is connectedin series with an external resistance of `10Omega`. If the potential difference across the cell is `1.25`

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The maximum power dissipated in an external resistance R, when connected to a cell of emf E and internal resistance r, will be

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If E is the emf of a cell of internal resistance r and external resistance R, then potential difference across R is given as

Description : If E is the emf of a cell of internal resistance r and external resistance R, then potential difference across R is given as

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What is terminal potential differnce of a cell? Can its value be greater than the emf of a cell? Explian.

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The emf of a primary cell depends upon the: a) Physical dimension of the cell b) Nature of the electrolyte c) Nature of the electrode d) Both (b) and (c)

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The emf of a Deniell cell “Zn | Zn2+|| Cu2+| Cu” can be increased by (A) Decreasing the surface area of the electrodes (B) Increasing the concentration of zinc sulphate solution (C) Increasing the surface area of the electrodes (D) Increasing the concentration of copper sulphate solution

Description : The emf of a Deniell cell “Zn | Zn2+|| Cu2+| Cu” can be increased by (A) Decreasing the surface area of the electrodes (B) Increasing the concentration of zinc sulphate solution (C) Increasing the surface area of the electrodes (D) Increasing the concentration of copper sulphate solution

Last Answer : (D) Increasing the concentration of copper sulphate solution

The emf of the dry cell is about a. 0 V b. 0.5 V c. 1 V d. 1.5 V

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Last Answer : d. 1.5 V

A neon flashlight cell with an emf of 1.5V gives a current of 15A when connected directly to an ammeter of resistance 0.04?. Internal resistance of the cell is a. 0.0004? b. 0.06? c. 0.10? d. 0.13?

Description : A neon flashlight cell with an emf of 1.5V gives a current of 15A when connected directly to an ammeter of resistance 0.04?. Internal resistance of the cell is a. 0.0004? b. 0.06? c. 0.10? d. 0.13?

Last Answer : b. 0.06?

Which one of the following is the advantage of connecting two dry cells in parallel instead of in series? Is it because the parallel arrangement: w) gives twice the EMF of one dry cell x) has no internal resistance y) generates heat in an external circuit half as fast as would a single cell z) has half the internal resistance of a single cell

Description : Which one of the following is the advantage of connecting two dry cells in parallel instead of in series? Is it because the parallel arrangement: w) gives twice the EMF of one dry cell x) has no ... circuit half as fast as would a single cell z) has half the internal resistance of a single cell

Last Answer : ANSWER: Z -- HAS HALF THE INTERNAL RESISTANCE OF A SINGLE CELL 

The terminal voltage of a cell supplying energy to a circuit is usually less than its emf because of the cell's w) size x) internal resistance y) mass z) energy

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Last Answer : ANSWER: X -- INTERNAL RESISTANCE

Why the emf of a cell is always greater than its terminal voltage? Explain the same.

Description : Why the emf of a cell is always greater than its terminal voltage? Explain the same.

Last Answer : Every practical source offers some opposition to the current due to its internal parts or components. Such a resistance of internal parts of source is called internal resistance of source. When source delivers ... less than emf induced. So, emf of a cell is always greater than terminal voltage.

What will you do when we get hit from a solar flare or EMF technology and you lose all the electronic devices you now have?

Description : What will you do when we get hit from a solar flare or EMF technology and you lose all the electronic devices you now have?

Last Answer : Roll over and die

How we can find the direction of induced emf?

Description : How we can find the direction of induced emf? 

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E.m.f. of a Weston cell is accurately measured by?

Last Answer : E.m.f. of a Weston cell is accurately measured by electrostatic voltmeter.

When troubleshooting an alkaline storage battery a weak or dead cell is best located by ____________. A. checking the specific gravity of each cell B. visually inspecting each cell's electrolyte level C. testing each cell with a voltmeter D. measuring the electrolyte temperature with an accurate mercury thermometer

Description : When troubleshooting an alkaline storage battery a weak or dead cell is best located by ____________. A. checking the specific gravity of each cell B. visually inspecting each cell's ... testing each cell with a voltmeter D. measuring the electrolyte temperature with an accurate mercury thermometer

Last Answer : Answer: C

When troubleshooting a lead-acid storage battery, a weak or dead cell is best detected by _________________. A. measuring and comparing all cells' specific gravity B. taking an open circuit voltage test of individual cells C. visually inspecting the electrolyte levels of each cell D. taking each cell's temperature with a calibrated mercury thermometer

Description : When troubleshooting a lead-acid storage battery, a weak or dead cell is best detected by _________________. A. measuring and comparing all cells' specific gravity B. taking an open circuit ... electrolyte levels of each cell D. taking each cell's temperature with a calibrated mercury thermometer

Last Answer : Answer: A

A differential pressure cell is used for (A) Measuring small pressure difference in gases (B) Measuring small pressure difference in liquids (C) Remote recording of pressure difference (D) Measuring the difference of the impact & the static pressure

Description : A differential pressure cell is used for (A) Measuring small pressure difference in gases (B) Measuring small pressure difference in liquids (C) Remote recording of pressure difference (D) Measuring the difference of the impact & the static pressure

Last Answer : (C) Remote recording of pressure difference