Current Electricity Test

Result

Current Electricity Test - 62

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Weekly Quiz Competition

Question 1
4 / -1

The resistance of a galvanometer coil is R. What is the shunt resistance required to convert it into an ammeter of range 4 times?

A

B

C

D
4R

Solution
Question 2
4 / -1

If an ammeter is connected in parallel to a circuit, it is likely to be damaged due to excess

A
Current

B
Voltage

C
Resistance

D
All of these
Question 3
4 / -1

In the given figure, battery E is balanced on 55 cm length of potentiometer wire but when a resistance of 10 Ω is connected in parallel with the battery then it balances on 50 cm length of the potentiometer wire then internal resistance r of the battery is

A
1 Ω

B
3 Ω

C
10 Ω

D
5 Ω

Solution
Question 4
4 / -1

In a potentiometer experiment the balancing with a cell is at length 240 cm. On shunting the cell with a resistance of 2 Ω, the balancing length becomes 120 cm. The internal resistance of the cell is

A
4 Ω

B
2 Ω

C
1 Ω

D
0.5 Ω

Solution
Question 5
4 / -1

The resistance of an ideal ammeter is

A
Infinite

B
Very high

C
Small

D
Zero
Question 6
4 / -1

A galvanometer has a resistance of 25 ohm and a maximum of 0.01 A current can be passed through it. In order to change it into an ammeter of range 10 A, the shunt resistance required is

A
5/999 ohm

B
10/999 ohm

C
20/999 ohm

D
25/999 ohm

Solution
Question 7
4 / -1

In the circuit shown, a meter bridge is in its balanced state. The meter bridge wire has a resistance 0.1 ohm/cm. The value of unknown resistance X and the current drawn from the battery of negligible resistance

A
6Ω, 5 amp

B
10Ω, 0.1 amp

C
4Ω, 1.0 amp

D
12Ω, 0.5 amp

Solution
Question 8
4 / -1

Voltmeters V₁ and V₂are connected in series across a D.C. line. V₁ reads 80 volt and has a per volt resistance of 200 ohm. V₂ has a total resistance of 32 kilo ohm. The line voltage is

A
120 volt

B
160 volt

C
220 volt

D
240 volt

Solution
Question 9
4 / -1

AB is a potentiometer wire of length 100 cm and its resistance is 10 ohm. It is connected in series with a resistance R = 40 ohm and a battery of e.m.f. 2 V and negligible internal resistance. If a source of unknown e.m.f. E is balanced by 40 cm length of the potentiometer wire, the value of E is

A
0.8 V

B
1.6 V

C
0.08 V

D
0.16 V

Solution
Question 10
4 / -1

An ammeter gives full deflection when a current of 2 amp. flows through it. The resistance of ammeter is 12 ohm. If the same ammeter is to be used for measuring a maximum current of 5 amp., then the ammeter must be connected with a resistance of

A
8 ohm in series

B
18 ohm in series

C
8 ohm in parallel

D
18 ohm in parallel

Solution