Current Electricity Physics Test 04

Total Questions: 24

3 - Nichrome wire is an alloy of:

A ) Lead and Zinc
B ) Silver and copper
C ) Nickel and Chromium ✅
D ) Iron and copper

4 - Thermocouples convert:

A ) Heat energy into electrical energy ✅
B ) Heat energy into light energy
C ) Heat energy into mechanical energy
D ) Chemical energy into electrical energy

5 - Which is the best material for making connecting wires?

A ) iron
B ) copper ✅
C ) tungsten
D ) nickel

6 - Specific resistance of iron:

A ) 9.8 × 10-⁸ Ωm ✅
B ) 100 × 10-⁸ Ωm
C ) 10.6 × 10 -⁸Ωm
D ) 5.25 × 10-⁸ Ωm

7 - Which is not an e.m.f source?

A ) generator
B ) Solar cell
C ) battery
D ) rheostat ✅

8 - A parallel circuit is also used as a divider for:

A ) power
B ) resistance
C ) current ✅
D ) Voltage

9 - Specific resistance of silver is:

A ) 1.7 × 10-⁸Ω.m ✅
B ) 2.63 ×10-⁸ Ω.m
C ) 2.75 × 10-⁸Ω.m
D ) 7.0× 10-⁸Ω.m

10 - Specific resistance of Aluminum in (10-⁸Ω.m) is:

A ) 1.7
B ) 2.75 ✅
C ) 5.25
D ) 1.69

11 - Which of the following is an insulator?

A ) Copper
B ) Iron
C ) Silk ✅
D ) Silver

12 - Power of electric heater is:

A ) 1500 W ✅
B ) 750 W
C ) 100 W
D ) 50 W

13 - Power of hair dryer is:

A ) 1000 W ✅
B ) 750 W
C ) 10 W
D ) 75 W

14 - The amount of current that can be felt is:

A ) 1A
B ) 0.1 A
C ) 0.001A ✅
D ) 2A

15 - The amount of current that can be painful is:

A ) 0.005A ✅
B ) 0.001A
C ) 1A
D ) 2A

17 - The amount of current that goes through the heart is:

A ) 0.070A ✅
B ) 0.1A
C ) 0.015
D ) 2A

18 - Which instrument is used to measure current, resistance and potential difference:

A ) galvanometer
B ) digital meter ✅
C ) Voltmeter
D ) Ammeter

19 - Earth wire is connected to the:

A ) power house
B ) transformer
C ) ground ✅
D ) generator

20 - Simplest electrical circuits use:

A ) one wire
B ) two wires ✅
C ) four wires
D ) five wires

21 - What does a switch do?

A ) oppose the current
B ) open and close the circuit ✅
C ) store energy
D ) provide voltage

23 - The formula of e.m.f is:

A ) E= J/Q
B ) F =W/l
C ) E = W/Q ✅
D ) E = Q/l