1) An element is called \"Ohmic\" if: a. The voltage drop on it increases propor

Question

1) An element is called "Ohmic" if:

a. The voltage drop on it increases proportionally as the current through it increases.

b. The voltage drop on it is independent of the current through it.

c. The voltage drop on it decreases proportionally as the current through it increases.

d. The voltage drop on it depends on the direction of the current through the element.

2) We couldn’t use the Digital Multimeter to measure the voltage on the capacitor during the lab experiment because:

a. of the high internal resistance of the Multimeter

b. only a small current range could be measured

c. of the low internal resistance of the Multimeter

d. only a small voltage range could be measured

3) How does the induced electromotive force (emf) vary with the frequency of the magnetic field?

a. independent

b. inversely proportional

c. linearly proportional

d. square law

4) The induced voltage on a pick up coil without an iron core is 2.5 V. How will the voltage change after inserting an iron core in the pick up coil?

a. It will not change.

b. It will increase.

c. It will decrease.

d. It will become half of the initial voltage.

4) Does the impedance Z have a maximum or minimum value at the resonance frequency?

a. minimum

b. maximum

c. impendance Z does not depend on frequency

5) Stationary charge Q1= 2 nC creates a magnetic field B1 at a distance of 1 m from the charge. Stationary charge Q2= 10 nC creates a magnetic field B2 at a distance of 2 m from the charge. Which of these statements is correct?

a. B1 = B2 = 5 T

b. B1 > B2

c. B1 < B2

d. B1 = B2 = 2 Gauss

e. B1 = B2 = 0

f. none of these

Explanation / Answer

1)

correct option is (a)

from the Ohms law, V=i*R

The voltage drop on it increases proportionally as the current through it increases.

2)

correct option is (a)

Digital Multimeter has the high internal resistance of the Multimeter

3)

correct option is (C)

because,

emf=N*B*A*W

4)

correct option is (C)

rate of change through flux is decrease

==> emf is also decreases

5)

correct option is (a)

because, Z=R

6)

correct option is (e)

B1=B2=0

becuse, stationary charge will not produced the magnetic field

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