1) When a magnetized bar of iron is strongly hammered, its magnetization: a. bec

Question

1) When a magnetized bar of iron is strongly hammered, its magnetization:
a. becomes stronger (b) becomes weaker (c) reserves its direction (d) is unchanged

2)Five joules of work are needed to shift 0.5 C of charge from one place to another. The potential differences between the places is : (a) 0.5 V (b) 2 V (c) 5 V (d) 10 V

3. How much energy is stored in a 9-V battery rated at 10 A hour?
a. 0.32 MW (b) 0.32 MJ (c) 0.65 MW (d) 0.65 MJ

4) The voltage needed to produce a current of 2 A in a resisitance off 40 ohms is

a. 8V (b) 50 V (c) 80 V (d) 200 V

5) The resistance of a light bulb that draws a current of 2 A when connected to a 12V battery is
a. 1.67 ohms (b) 2 ohms (c) 6 ohms (d) 24 ohms

6) A car's storage battery is being charged at a rate of 75 W. If the potential difference across the battery's terminal is 5V, the electric charge being transferred is at :

(a)1 C/s (b) 5 C/s (c) 10 C/s (d) 15 C/s

7) When the voltage across a resistor is V, the power delivered is P. If the voltage is doubled to 2V, the powered delivered becomes

(a) 1.0 P (b)1.44 P (c) 2.4P (d) 4P

Explanation / Answer

1. (b) becomes weaker

2. (d) 10 V

3 (b) 0.32 MJ

4 (c) 80 V

5 (c) 6 ohms

6 (d) 15 C/s

7 (a) 1.0 P

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.