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Chapter 15 Direct Current Circuits

Authored by shanii pok

Physics

12th Grade - University

Used 81+ times

Chapter 15 Direct Current Circuits
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14 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

A circuit is set up as shown in the diagram. The e.m.f. of the battery is 1.5 V and the resistance R is 2.0  Ω\Omega . Which statement below is not true about the circuit?

When switch S is opened, the voltmeter reads 1.5 V.

When switch S is closed, the voltmeter reads less than 1.5 V.

When switch S is closed, the ammeter reads 0.75 A.

When switch S is opened, the ammeter reads zero.

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

In a circuit, the current flow is 1.0 A. If the potential difference across the resistor is 1.0 V and the e.m.f. of the cell is 1.5 V, what is the internal resistance of the cell?

0.2 Ω\Omega

0.5 Ω\Omega

1.2 Ω\Omega

1.5 Ω\Omega

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Media Image

The cells in the above circuits have internal resistance 1.0 Ω\Omega and all the bulbs are identical. Which circuit has the highest ammeter reading?

A

B

C

D

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Media Image

Three identical cells each of e.m.f. 1.5 V and internal resistance 0.5 Ω\Omega are connected to a resistor of resistance 6 \Omega as shown in the diagram. Which statement below is not true about the circuit?

The voltmeter reads a value less than the total e.m.f. of the cells.

The voltmeter reads the potential difference across the 6 \Omega resistor.

The effective e.m.f. of the cells is equal to the e.m.f. of one cell.

The power dissipated in overcoming the internal resistance of the three cells is 0.24 W.

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Media Image

One part of a circuit is as shown in the diagram. If the current flowing in the circuit is 2 mA and the potential at point P is 12 V, find the potential at point R.

0 V

2 V

4 V

8 V

6.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Media Image

A

B

C

D

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Media Image

An electric circuit is as shown in the diagram. If cell P and cell Q have e.m.f. 3 V and 4 V with internal resistance 1 Ω\Omega  and 2 \Omega respectively, calculate the current flowing in the circuit.

0.20 A

0.50 A

1.0 A

1.2 A

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