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Physics 10 Chapter 14 - Current and Electricity - 31
1.
What is the symbol for alternating current?
a) A.C
b) A Cl
c) Ac
d) ACc
2.
In Pakistan, how many times alternating current oscillates every second
a) 70 times
b) 50 times
c) 100 times
d) 30 times
3.
In how many seconds, alternating current oscillates 50 times in Pakistan?
a) In one second
b) In one minute
c) In two second
d) In two minute
4.
What is the frequency of alternating current in Pakistan?
a) 50 Hz
b) 30 Hz
c) 70 Hz
d) 100 Hz
5.
What type of current is supplied to our homes by power companies?
a) Uni-directional current
b) Direct current
c) Alternating current
d) M.C. current
6.
Through how many wire(s), the electric power enters our house?
a) Through four wires
b) Through one wire
c) Through two wires
d) Through three wires
7.
Which of the following wire carries no electricity?
a) Neutral wire
b) Positive wire
c) Live wire
d) Earth wire
8.
Which of the following wire carries no electricity?
a) Live wire
b) Positive wire
c) Ground wire
d) Neutral wire
9.
Which of the following wire carries no electricity?
a) (b) Ground wire
b) (a) Both b and c
c) (d) Live wire
d) (c) Earth wire
10.
Which of the following wire is connected to a large metal plate buried deep in the ground near the house?
a) (b) Ground wire
b) (c) Earth wire
c) (a) Both b and c
d) (d) Live wire
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