Board paper · 2025 · Oswaal Books (reproduction of CISCE board paper)
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From the same topic and chapter, at a similar level.
But it is observed that they are attracting each other. (A) In questions (i) to (vii) given below, choose the What change should the student make for the wires correct alternative (a), (b), (c) or (d). to repel each other? [1]
If kinetic energy of moving electrons is made four and Reason. Read the two statements and choose
times, then their de Broglie wavelength becomes: the correct option.
Assertion: When a convex lens made of glass is
2] is not the correct explanation for Assertion. In case of a short electric dipole: (c) Assertion is true and Reason is false.
What is the locus of a point having zero potential?
(d) Both Assertion and Reason are false.
But it is observed that they are attracting each other. (A) In questions (i) to (vii) given below, choose the What change should the student make for the wires correct alternative (a), (b), (c) or (d). to repel each other? [1]
When a battery is connected between the terminals R1 R2
P and Q, as shown in Figure 1 below, it is found MS
that no current flows through 5Ω resistor. Then, the
value of resistor X is:
P
10 10 E1 E2
25 X NT
Q Figure 2
Figure 1 (a) Reverse the terminals of batteries E1 and E2.
(a) 10 Ω (b) 20 Ω (b) Reverse the terminals of battery E1 or E2.
(c) 25 Ω (d) 45 Ω (c) Choose supply voltage such that E1 = E2.
But it is observed that they are attracting each other. (A) In questions (i) to (vii) given below, choose the What change should the student make for the wires correct alternative (a), (b), (c) or (d). to repel each other? [1]
The relative permeability of substance ‘X’ is slightly (d) Add key and ammeter to the circuit.
less than one and that of substance ‘Y’ is slightly (v) N-type semiconductor is that which has:
more than one. Then: (a) majority of holes as charge carriers.
(a) ‘X’ is paramagnetic and ‘Y’ is ferromagnetic. (b) majority of free electrons as charge carriers.
(b) ‘X’ is diamagnetic and ‘Y’ is ferromagnetic. (c) trivalent element added as an impurity.
(c) ‘X’ is paramagnetic and ‘Y’ is diamagnetic. (d) an equal number of holes and free electrons.
(d) ‘X’ is diamagnetic and ‘Y’ is paramagnetic. (vi) Given below are two statements marked, Assertion
But it is observed that they are attracting each other. (A) In questions (i) to (vii) given below, choose the What change should the student make for the wires correct alternative (a), (b), (c) or (d). to repel each other? [1]
Given below are two statements marked, Assertion
and Reason. Read the two statements and choose E
the correct option. Figure 4 Figure 5
Assertion: Diffraction of light is difficult to observe
in everyday situations but can be observed in (a) In which of the two combinations, emf of the
laboratory conditions. battery is greater?
Reason: To produce diffraction of waves, size of an (b) When a resistor ‘R’ is connected between the
obstacle must be comparable to the wavelength of terminals P and Q, I1 and I2 are the currents
the waves. flowing through ‘R’ in Figure 4 and Figure 5
(a) Both Assertion and Reason are true and Reason I
respectively. Obtain the ratio 1 .
is the correct explanation for Assertion. I2
(b) Both Assertion and Reason are true but Reason
2] is not the correct explanation for Assertion. In case of a short electric dipole: (c) Assertion is true and Reason is false.
If electric field intensity at a point in axial position is
(B) Answer the following questions briefly: E1 and at an equidistant point in equatorial position
