Current Electricity (NEET Physics): Questions 10 - 12 of 75

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Question number: 10

» Current Electricity » Electric Cell and Its Internal Resistance

MCQ▾

Question

In the circuit shown below, if the value of R is increased then what will be the effect on the reading of ammeter if the internal resistance of cell is negligible-

 Circuit consist ammeter, two resistors and one battery

Circuit Consist Ammeter, Two Resistors and One Battery

As show in circuit ammeter and one resistor of resistance R’ connected in series, and parallel to that one resistance connected and across it one battery connected.

Choices

Choice (4) Response
a.

The reading of ammeter will decrease

b.

The reading of ammeter will increase

c.

The reading of ammeter will become zero.

d.

The reading of ammeter will remain unchanged

Question number: 11

» Current Electricity » Electrical Resistance

MCQ▾

Question

In the circuit shown, the galvanometer G reads zero. If batteries have negligible internal resistances, the value of resistance X will be –

Circuit diagram with resistors, battery, and galvanometer.

Circuit Diagram With Resistors, Battery, and Galvanometer.

In figure X is the unknown resistor and other components are mentioned.

Choices

Choice (4) Response
a.

500 Ω

b.

200 Ω

c.

10 Ω

d.

100 Ω

Question number: 12

» Current Electricity » Temperature Dependence of Resistance

Assertion-Reason▾

Assertion (Ꭺ)

The temperature coefficient of resistance is positive for metals and negative for p-type semiconductor.

Reason (Ꭱ)

The effective charge carriers in metals are negatively charged whereas in p-type semiconductor they are positively charged.

Choices

Choice (4) Response
a. Both Ꭺ and Ꭱ are false
b. Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ
c. Ꭺ is true but Ꭱ is false
d. Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

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