CSS - PMS - CCE - PCS - Everyday Science
Electricity and Magnetism
A 40 W appliance runs for 3 h. Electrical energy used is:
A. 0.12 kWh
B. 0.11 kWh
C. 1.12 kWh
D. 0.13 kWh
Correct Answer: A
Energy = kW × h.
CSS - PMS - CCE - PCS - Everyday Science
Electricity and Magnetism
A 40 W appliance runs for 2 h. Electrical energy used is:
A. 0.08 kWh
B. 1.08 kWh
C. 0.07 kWh
D. 0.09 kWh
Correct Answer: A
Energy = kW × h.
CSS - PMS - CCE - PCS - Everyday Science
Electricity and Magnetism
A 40 W appliance runs for 1 h. Electrical energy used is:
A. 1.04 kWh
B. 0 kWh
C. 0.04 kWh
D. 0.08 kWh
Correct Answer: C
Energy = kW × h.
CSS - PMS - CCE - PCS - Everyday Science
Electricity and Magnetism
A device operates at 240 V and draws 5 A. Power is:
A. 1201 W
B. 1199 W
C. 1200 W
D. 1202 W
Correct Answer: C
P = VI.
CSS - PMS - CCE - PCS - Everyday Science
Electricity and Magnetism
A device operates at 240 V and draws 3 A. Power is:
A. 720 W
B. 719 W
C. 721 W
D. 722 W
Correct Answer: A
P = VI.
CSS - PMS - CCE - PCS - Everyday Science
Electricity and Magnetism
A device operates at 240 V and draws 2 A. Power is:
A. 482 W
B. 481 W
C. 480 W
D. 479 W
Correct Answer: C
P = VI.
CSS - PMS - CCE - PCS - Everyday Science
Electricity and Magnetism
A device operates at 240 V and draws 1 A. Power is:
A. 241 W
B. 239 W
C. 240 W
D. 242 W
Correct Answer: C
P = VI.
CSS - PMS - CCE - PCS - Everyday Science
Electricity and Magnetism
A device operates at 240 V and draws 0.5 A. Power is:
A. 120 W
B. 122 W
C. 121 W
D. 119 W
Correct Answer: A
P = VI.
CSS - PMS - CCE - PCS - Everyday Science
Electricity and Magnetism
A device operates at 120 V and draws 5 A. Power is:
A. 602 W
B. 599 W
C. 601 W
D. 600 W
Correct Answer: D
P = VI.
CSS - PMS - CCE - PCS - Everyday Science
Electricity and Magnetism
A device operates at 120 V and draws 3 A. Power is:
A. 361 W
B. 359 W
C. 362 W
D. 360 W
Correct Answer: D
P = VI.
CSS - PMS - CCE - PCS - Everyday Science
Electricity and Magnetism
A device operates at 120 V and draws 2 A. Power is:
A. 241 W
B. 242 W
C. 239 W
D. 240 W
Correct Answer: D
P = VI.
CSS - PMS - CCE - PCS - Everyday Science
Electricity and Magnetism
A device operates at 120 V and draws 1 A. Power is:
A. 119 W
B. 122 W
C. 121 W
D. 120 W
Correct Answer: D
P = VI.
CSS - PMS - CCE - PCS - Everyday Science
Electricity and Magnetism
A device operates at 120 V and draws 0.5 A. Power is:
A. 61 W
B. 60 W
C. 62 W
D. 59 W
Correct Answer: B
P = VI.
CSS - PMS - CCE - PCS - Everyday Science
Electricity and Magnetism
A device operates at 48 V and draws 5 A. Power is:
A. 242 W
B. 240 W
C. 241 W
D. 239 W
Correct Answer: B
P = VI.
CSS - PMS - CCE - PCS - Everyday Science
Electricity and Magnetism
A device operates at 48 V and draws 3 A. Power is:
A. 143 W
B. 146 W
C. 145 W
D. 144 W
Correct Answer: D
P = VI.
CSS - PMS - CCE - PCS - Everyday Science
Electricity and Magnetism
A device operates at 48 V and draws 2 A. Power is:
A. 97 W
B. 98 W
C. 96 W
D. 95 W
Correct Answer: C
P = VI.
CSS - PMS - CCE - PCS - Everyday Science
Electricity and Magnetism
A device operates at 48 V and draws 1 A. Power is:
A. 47 W
B. 48 W
C. 49 W
D. 50 W
Correct Answer: B
P = VI.
CSS - PMS - CCE - PCS - Everyday Science
Electricity and Magnetism
A device operates at 48 V and draws 0.5 A. Power is:
A. 25 W
B. 24 W
C. 26 W
D. 23 W
Correct Answer: B
P = VI.
CSS - PMS - CCE - PCS - Everyday Science
Electricity and Magnetism
A device operates at 24 V and draws 5 A. Power is:
A. 121 W
B. 120 W
C. 122 W
D. 119 W
Correct Answer: B
P = VI.
CSS - PMS - CCE - PCS - Everyday Science
Electricity and Magnetism
A device operates at 24 V and draws 3 A. Power is:
A. 73 W
B. 74 W
C. 71 W
D. 72 W
Correct Answer: D
P = VI.