Electrical appliances in homes are normally earthed so that
a person touching the appliances is safe from electric shock
both the a.c. and d.c. sources can be used
the appliances are maintained at a higher pd than the earth
the appliances are maintained at a lower pd than the earth
Correct answer is A
No explanation has been provided for this answer.
no charge and a zero potential
a positive charge and a zero potential
a negative charge and a positive potential
a negative charge and a negative potential
Correct answer is D
No explanation has been provided for this answer.
The time rate of loss of heat by a body is proportional to the
temperature of its surroundings
temperature of the body
difference in temperature between the body and its surroundings
ratio of the temperature of the body to that of its surroundings
Correct answer is C
No explanation has been provided for this answer.
In the diagram shown, which of the simple pendulum will resonate with P when set into oscillation?
U
T
R and T
Q and R
Correct answer is B
No explanation has been provided for this answer.
20 years
10 years
2 years
24 years
Correct answer is A
No explanation has been provided for this answer.
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Aptitude Tests