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Science M.C.Q-[Phy-1M]

MODEL PAPER - 7 [2026] · CBSE STD 10 (CBSE - English Medium). 2 questions.

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M.C.Q-[Phy-1M]

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MCQ 21 Mark
Which of the following statements is/are incorrect?
A. A neutron has a positive charge of $+1.6 \times 10^{-19} C$
B. An ammeter is a low resistance device.
C. The resistance of semiconductors decreases with temperature.
D. One ampere is equal to $10^{-6} uA$.
  • A
    A and C
  • B
    A, B and C
  • ✓
    A and D
  • D
    A and B
Answer
Correct option: C.
A and D
(C) A and D
Explanation :
B and C are correct. An ammeter is a low resistance device. A semiconductor material has an electrical conductivity value falling between that of a conductor, such as copper, and an insulator, such as glass. As the temperature increases, their resistance decreases.
A and D are incorrect. A neutron is a sub-atomic particle that has no charge. One $\mu A$ is equal to $10^{-6} A$. An ampere is a bigger unit. Micro-ampere $(\mu A)$ is a smaller unit.
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