Physics (2018) | Study Mode

Question 21
A
decreasing the loudness
B
increasing the intensity
C
increasing the frequency
D
decreasing the intensity
Explanation

Question 22
A
B
C
neutrons are not released
D
the of the masses of the reactants equals the sum of the masses of the products
Explanation

Question 23
A
16.03cm$$^3$$
B
15.09cm$$^3$$
C
16.00cm$$^3$$
D
15.03cm$$^3$$

Question 24
A
100J
B
150J
C
50J
D
200J

Question 25
A
30V
B
70V
C
50V
D
40V

Question 26
A
20 years
B
10 years
C
2 years
D
24 years
Explanation

Question 27
A
specific heat capacity
B
latent heat
C
heat capacity
D
internal energy
Explanation

The heat capacity of a defined system is the amount of heat (usually expressed in calories, kilocalories, or joules) needed to raise the system's temperature by one degree (usually expressed in Celsius or Kelvin).

Question 28
A
temperature of its surroundings
B
temperature of the body
C
difference in temperature between the body and its surroundings
D
ratio of the temperature of the body to that of its surroundings
Explanation

Question 29
A
no charge and a zero potential
B
a positive charge and a zero potential
C
a negative charge and a positive potential
D
a negative charge and a negative potential
Explanation

Question 30
A
a person touching the appliances is safe from electric shock
B
both the a.c. and d.c. sources can be used
C
the appliances are maintained at a higher pd than the earth
D
the appliances are maintained at a lower pd than the earth