Assertion (A): Power loss in a conductor of resistance P = I2R. Reason (R): When

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Question
Assertion (A): Power loss in a conductor of resistance P = I²R.
Reason (R): When a conductor is carrying current with current density J as a result of applied field E, then heat developed/m³/ second = JE.
Options
A. Both A and R are true and R is correct explanation of A
B. Both A and R are true but R is not correct explanation of A
C. A is true but R is false
D. A is false but R is true

Correct Answer

Both A and R are true and R is correct explanation of A

Explanation

Heat developed depends an power loss.

Materials and Components problems

Search Results

1. Which of the following are donor impurities?
1. Gold
2. Phosphorus
3. Boron
4. Antimony
5. Arsenic
6. Induim
Select the correct answer using the following codes
Options
A. 1, 2, 3
B. 1, 2, 4, 6
C. 3, 4, 5, 6
D. 2, 4, 5

2. Assertion (A): Atomic number of sodium is 11.
Reason (R): Sodium has a body centred cubic lattice.
Options
A. Both A and R are true and R is correct explanation of A
B. Both A and R are true but R is not correct explanation of A
C. A is true but R is false
D. A is false but R is true

3. At room temperature, the current in intrinsic semiconductor is due to
Options
A. holes
B. electrons
C. ions
D. holes and electrons

4. Ferroelectric materials are those which
Options
A. cannot be polarized
B. have a permanent polarization
C. have a_e equal to zero
D. have ?_p = 0

5. The apparent capacitance at a high angular frequency ? of an air cored capacitor having capacitance C and inductance L is given by
Options
A.
B.
C.
D.

6. When an electric field E is applied to solid and liquid insulating materials, the internal field E_i acting at the location of atom is such that
Options
A. E_i = E
B. E_i > E
C. E_i < E
D. E_i may be equal to or less than E

7. The number of valence electrons in donor impurity are
Options
A. 5
B. 4
C. 3
D. 1

8. Assertion (A): In imperfect capacitors, the current does not lead the applied ac voltage by 90�.
Reason (R): When subjected to ac fields, the dielectric constant can be expressed as ?^'_r - j?^"_r.
Options
A. Both A and R are true and R is correct explanation of A
B. Both A and R are true but R is not correct explanation of A
C. A is true but R is false
D. A is false but R is true

9. Assertion (A): Ferroelectric materials have spontaneous polarization.
Reason (R): Above curie temperature, ? = for ferro-electric materials.
Options
A. Both A and R are true and R is correct explanation of A
B. Both A and R are true but R is not correct explanation of A
C. A is true but R is false
D. A is false but R is true

10. Which capacitor-store higher amount of energy?
Options
A. Air capacitor
B. Paper capacitor
C. Mica capacitor
D. Plastic film capacitor

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