Electric Current Quiz 6 – Punjab Meritorious School Preparation Portal

Welcome to your 24th Aug Electric Current Quiz 6 CBT TEST

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A piece of copper and another of germanium are cooled from room temperature of 80K. The resistance of –

Each of them increases

Each of them decreases

Copper increases and germanium decreases

Copper decreases and germanium increases

2Rr / (R + r)

8R (R + r) / (3 R + r)

2r + 4R

5R / 2 + 2r

10 kJ

30 kJ

20 kJ

0 kJ

0

2 A

3A

5 A

13.86 s

6.93 s

7 s

14 s

0

1 V

2 V

3 V

A steady current flows in a metallic conductor of non-uniform cross section. The quantity/quantities constant along the length of the conductor is/are –

current, electric field and drift speed

drift speed only

current and drift speed

current only

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