# Physics | Study Mode

Question 11
A

2.0 x 106m3

B

2.5 x 10-6m3

C

3.0 x10-6m3

D

2.0 x 10-6m3

##### Explanation

Weight of liquid displaced = Upthrust
= (0.040 - 0.024)N
= 0.016N = 0.016/10 = 1.6 X 10-3kg
Volume of the object = Volume of liquid displaced
=

 Mass of liquid = 1.6 x 10-1kg density of liquid 800kgm-2

= 2.0 x 106m3 (A)

Question 12
A
change in momentum of a body
B
its unit is Ns
C
product of force and time
D
change in acceleration of a body
##### Explanation
Impulse, Ft = m(v-u)

(D)

Question 13
A
pressure, work and electric potential
B
force, momentum and distance
C
velocity, energy and impulse
D
mass, time and temperature
##### Explanation
Mass, time and temperature are all scala rquantities. They possess magnitude but no direction (D)

Question 14
A

24cm

B

12cm

C

10cm

D

8cm

##### Explanation

Object distance, U = 24cm (A)

Question 15
A

red, blue and orange

B

blue, red, orange

C

red, orange, blue

D

orange, blue, red

##### Explanation

Red light has the highest speed and it is the least deviated while violet with the lowest speed is the most deviated (D)

Question 16
A

5.6 minutes

B

9.6 minutes

C

10.0 minutes

D

19.3 minutes

##### Explanation

Heat loss by kettle = heat gained by water
1vt = mc
(6) (210)t = (3)(60)(4200)
1260t = 756000
t = 600secs = 10min

Question 17
A
amplitude of a noise is greater than that of a musical note
B
frequency of a musical note is regular while that of a noise is irregular
C
wavelength of a musical note is longer than that of a noise
D
frequency of a note is higher than that of a musical note
B

Question 18
A
wave crest
B
wave tough
C
wave amplitude
D
wave front
##### Explanation
Wave front is any line or section taken through an advancing wave in which all the particles are in the same phase (D)

Question 19
A
969 parallel
B
990 parallel
C
10 parallel
D
10 parallel
##### Explanation
Since the total current which can pass
through the galvanometer is O.D.I.A. The
total p.d. across the galvanometer and the
resistance R = 0.01A(10+R)=10
10+R = 1000
R=1000 - 10=990 inseries (B)

Question 20
A
hydrogen
B
calcium
C
copper
D