Advanced level 2025 Littoral Regional Mock physics 1
Advanced level 2025 Littoral Regional Mock physics 1
V» ) I he table below gives the corrected count rntc ( in
counts per minute) from three samples of
radioactive isotopes at
Isotope 0 min
2. If the resistance of R is very large, the
current in the circuit is very small but
most of the power supplied by the battery
is dissipated by R.
3. If the resistance of R is 4 Q, the power
supplied to R by the battery is maximum
40) For a real gas;
1. the volume of the molecules cannot be
neglected.
2. inlcrmolccular forces may be neglected
except during collisions.
3. collisions between molecules and the wall
of a container are not perfectly elastic.
41 ) Figure 20 shows two small test charges +q
and +2q brought from infinity to the positions
shown.
hree different limes.
20 min 40 min
X 480 243 I 19
Y 135 32 9
Z 168 1 I S 93
The above data show that;
1. X produces the most penetrating radiation.
2. Y has the largest decay constant.
3. Z has the longest half–life.
37) In ligure IS, A and B arc identical light bulbs and
L is a pure iron cored inductor.
L
&
+Q +q +2q
O
S r«
cl d
Figure IS
Which of the following statements is/are correct?
1. When switch S is closed, bulb A will light up
first.
2. After switch S is closed for some time. A and
B arc equally bright.
3. When switch S is open, bulb A will go out
first.
Figure 20
The two charges arc collincar with another
charge +Q and their mutual separation is d . It
is true from the figure that;
1. the potential energy of the system would
increase if d increases.
2. the work done in bringing the charges +q
and i 2q from infinity to their respective
positions is the same.
3. charge +q is at a higher potential than
charge ^ 2q.
38) A simple motor rotating at a steady speed is
suddenly jammed and comes to a stop. Which of
the following statements is/are correct?
1. The rate of change of magnetic flux through
the coil of the motor will be very large.
2. A large c.m.f will be induced in the coil of the
motor.
3. A large current will llow through the coil of
the motor.
39) The circuit in figure 19, shows a battery F of *
internal resistance 4 Q connected in series to a
variable resistor R.
42) When a beam of white light passes through
iodine vapour, the spectrum of the emergent
light shows dark lines. Which of the
following statement(s) is/are correct?
1. The iodine vapour absorbs all frequencies
from the light except those which it emits.
2. I‘lie iodine vapour emits less energy than
it absorbs.
3. The iodine vapour absorbs the same
frequencies as it emits.
* .
E
4.0 LI
W
43) An air bubble is blown at the end of a
capillary tube dipping into a liquid of surface
tension T. The excess pressure needed to
blow the bubble is;
1. directly proportional to T.
2. greatest at the beginning when one starts
to blow.
3. least when the bubble is a hemisphere.
Figure 19
It is true from the circuit that;
If the resistance of R is very small, the
terminal p.d of the battery is very small and
the power dissipated in the battery is small
