Current Electricity Physics Test 02

Total Questions: 23

1 - The A.C used in Pakistan has frequency:

A ) 60 Hz
B ) 30 Hz
C ) 50 Hz ✅
D ) 130 Hz

2 - The current used in houses is:

A ) Alternating current ✅
B ) Conventional current
C ) Direct current
D ) Battery current

3 - The current which changes its direction is called:

A ) Transient current
B ) Conventional current
C ) Alternating current ✅
D ) Direct current

4 - The period in which voltage repeats its value in equal intervals is called:

A ) Cycle
B ) Time period ✅
C ) Frequency
D ) Amplitude

5 - The current which does not change its direction is called:

A ) A.C
B ) Conventional
C ) D.C ✅
D ) Transient current

6 - The resistance of voltmeter is:

A ) zero
B ) low
C ) very high ✅
D ) 10Ω

7 - The colour of live wire is:

A ) Black or blue
B ) Green or yellow
C ) White or Gray
D ) Red or Brown ✅

8 - Specific resistance of copper is:

A ) 1.62 x 10-⁸Ω -m
B ) 1.69 × 10-⁸Ω-m ✅
C ) 5.25 × 10-⁸ Ω-m
D ) 2.75 × 10-⁸Ω-m

9 - Current is equal to:

A ) RV
B ) QR
C ) Q/t ✅
D ) t/Q

10 - As the temperature of a conductor rises, its resistance:

A ) Increases ✅
B ) Decreases
C ) Does not change
D ) None of these

11 - The property of substance, which opposes the flow of current through it is called:

A ) Resistance ✅
B ) Reactance
C ) Resistivity
D ) Inductance

12 - When resistance are connected in series the current passing through them is:

A ) different
B ) zero
C ) the same ✅
D ) none of these

13 - The equivalent resistance of a parallel combination is:

A ) equal to sum of all resistance
B ) is greater than the largest resistance of combination
C ) is smaller than the smallest resistance of combination ✅
D ) all of these

14 - A digital multimeter is used to measure:

A ) Current
B ) Resistance
C ) Potential difference
D ) All of the above

15 - A thermister is a dependent resistors:

A ) Heat
B ) Temperature ✅
C ) Energy
D ) Mass

16 - Diamond does not conduct electricity, because it has no:

A ) free electrons ✅
B ) free protons
C ) free neutrons
D ) free positive charge

17 - The power of washing machine is:

A ) 700W
B ) 750W ✅
C ) 650W
D ) 800W

18 - The power of small fan is:

A ) 40W
B ) 50W ✅
C ) 60W
D ) 80W

21 - Watt is equal to:

A ) Coulomb per second
B ) Newton per second
C ) Volt per second
D ) Joule per second ✅

22 - The commercial unit of electrical energy is:

A ) Joul
B ) Watt
C ) Kilowatt hour ✅
D ) Electron Volt

23 - In houses consumption of electric energy is measured in:

A ) Kilowatt-hour ✅
B ) Watts
C ) Watt-hour
D ) Joule-hour