CSS - PMS - CCE - PCS - Everyday Science
Electricity and Magnetism
If 10 C passes a point in 2 s, current is:
A. 4 A
B. 5 A
C. 7 A
D. 6 A
Correct Answer: B
I = Q/t.
CSS - PMS - CCE - PCS - Everyday Science
Electricity and Magnetism
Resistors 8 Ω and 12 Ω in parallel have equivalent resistance:
A. 4.32 Ω
B. 5.8 Ω
C. 5.28 Ω
D. 4.8 Ω
Correct Answer: D
R = R1R2/(R1+R2).
CSS - PMS - CCE - PCS - Everyday Science
Electricity and Magnetism
Resistors 8 Ω and 12 Ω in series have equivalent resistance:
A. 21 Ω
B. 22 Ω
C. 19 Ω
D. 20 Ω
Correct Answer: D
Series resistances add.
CSS - PMS - CCE - PCS - Everyday Science
Electricity and Magnetism
Resistors 3 Ω and 7 Ω in parallel have equivalent resistance:
A. 3.1 Ω
B. 2.31 Ω
C. 1.89 Ω
D. 2.1 Ω
Correct Answer: D
R = R1R2/(R1+R2).
CSS - PMS - CCE - PCS - Everyday Science
Electricity and Magnetism
Resistors 3 Ω and 7 Ω in series have equivalent resistance:
A. 11 Ω
B. 10 Ω
C. 9 Ω
D. 12 Ω
Correct Answer: B
Series resistances add.
CSS - PMS - CCE - PCS - Everyday Science
Electricity and Magnetism
Resistors 10 Ω and 20 Ω in parallel have equivalent resistance:
A. 6 Ω
B. 7.67 Ω
C. 7.34 Ω
D. 6.66667 Ω
Correct Answer: D
R = R1R2/(R1+R2).
CSS - PMS - CCE - PCS - Everyday Science
Electricity and Magnetism
Resistors 10 Ω and 20 Ω in series have equivalent resistance:
A. 30 Ω
B. 32 Ω
C. 29 Ω
D. 31 Ω
Correct Answer: A
Series resistances add.
CSS - PMS - CCE - PCS - Everyday Science
Electricity and Magnetism
Resistors 5 Ω and 10 Ω in parallel have equivalent resistance:
A. 4.33 Ω
B. 3.33333 Ω
C. 3 Ω
D. 3.66 Ω
Correct Answer: B
R = R1R2/(R1+R2).
CSS - PMS - CCE - PCS - Everyday Science
Electricity and Magnetism
Resistors 5 Ω and 10 Ω in series have equivalent resistance:
A. 17 Ω
B. 16 Ω
C. 15 Ω
D. 14 Ω
Correct Answer: C
Series resistances add.
CSS - PMS - CCE - PCS - Everyday Science
Electricity and Magnetism
Resistors 4 Ω and 6 Ω in parallel have equivalent resistance:
A. 2.4 Ω
B. 2.16 Ω
C. 3.4 Ω
D. 2.64 Ω
Correct Answer: A
R = R1R2/(R1+R2).
CSS - PMS - CCE - PCS - Everyday Science
Electricity and Magnetism
Resistors 4 Ω and 6 Ω in series have equivalent resistance:
A. 10 Ω
B. 11 Ω
C. 12 Ω
D. 9 Ω
Correct Answer: A
Series resistances add.
CSS - PMS - CCE - PCS - Everyday Science
Electricity and Magnetism
Resistors 2 Ω and 3 Ω in parallel have equivalent resistance:
A. 2.2 Ω
B. 1.2 Ω
C. 1.08 Ω
D. 1.32 Ω
Correct Answer: B
R = R1R2/(R1+R2).
CSS - PMS - CCE - PCS - Everyday Science
Electricity and Magnetism
Resistors 2 Ω and 3 Ω in series have equivalent resistance:
A. 6 Ω
B. 7 Ω
C. 4 Ω
D. 5 Ω
Correct Answer: D
Series resistances add.
CSS - PMS - CCE - PCS - Everyday Science
Electricity and Magnetism
A 1500 W appliance runs for 10 h. Electrical energy used is:
A. 17 kWh
B. 14 kWh
C. 15 kWh
D. 16 kWh
Correct Answer: C
Energy = kW × h.
CSS - PMS - CCE - PCS - Everyday Science
Electricity and Magnetism
A 1500 W appliance runs for 5 h. Electrical energy used is:
A. 8.25 kWh
B. 7.5 kWh
C. 6.75 kWh
D. 8.5 kWh
Correct Answer: B
Energy = kW × h.
CSS - PMS - CCE - PCS - Everyday Science
Electricity and Magnetism
A 1500 W appliance runs for 3 h. Electrical energy used is:
A. 5.5 kWh
B. 4.05 kWh
C. 4.5 kWh
D. 4.95 kWh
Correct Answer: C
Energy = kW × h.
CSS - PMS - CCE - PCS - Everyday Science
Electricity and Magnetism
A 1500 W appliance runs for 2 h. Electrical energy used is:
A. 3 kWh
B. 2 kWh
C. 5 kWh
D. 4 kWh
Correct Answer: A
Energy = kW × h.
CSS - PMS - CCE - PCS - Everyday Science
Electricity and Magnetism
A 1500 W appliance runs for 1 h. Electrical energy used is:
A. 2.5 kWh
B. 1.65 kWh
C. 1.35 kWh
D. 1.5 kWh
Correct Answer: D
Energy = kW × h.
CSS - PMS - CCE - PCS - Everyday Science
Electricity and Magnetism
A 1000 W appliance runs for 10 h. Electrical energy used is:
A. 11 kWh
B. 12 kWh
C. 10 kWh
D. 9 kWh
Correct Answer: C
Energy = kW × h.
CSS - PMS - CCE - PCS - Everyday Science
Electricity and Magnetism
A 1000 W appliance runs for 5 h. Electrical energy used is:
A. 4 kWh
B. 7 kWh
C. 6 kWh
D. 5 kWh
Correct Answer: D
Energy = kW × h.