Free Printable Grade 9 Dynamic Electricity!

1.

What quantity is always the same across all loops of a parallel circuit?

a)

Current

b)

Resistance

c)

Voltage

d)

Power

2.

Two wires are made of the same material. Wire A is both thinner and colder than wire B. Which would we expect to have a higher resistance value?

a)

Wire A

b)

Wire B

c)

They would have the same value

d)

Not enough information to say for sure

3.

Celia is in a graphing mood, and wants to construct a V vs. I graph for a given resistor. What would have to be true for the graph to show a linear relationship?

a)

The resistance is very large.

b)

The resistor is ohmic.

c)

The resistor is non-ohmic.

d)

The resistance is small.

4.

Given $P=IV$ and $V=IR$ , how could I find power in terms of $V$ and $R$ ?

a)

$V^2R$

b)

$\frac{V^2}{R}$

c)

$IV$

d)

$\frac{V}{R}$

5.

If $R_1>R_2>R_3$ , what can we say about $I_1,\ I_2,\ I_3?$

a)

$I_1=I_2=I_3$

b)

$I_1>I_2>I_3$

c)

$I_3>I_2>I_1$

d)

Not enough information

6.

Antoine feels his circuit containing two resistors connected to a battery in parallel lacks current. How could he increase the total current?

a)

Use a battery with a lower voltage

b)

Connect a second battery in parallel

c)

Connect the resistors in series instead of parallel

d)

Switch out one resistor for one with a lower resistance value

7.

Which unit would be equal to one joule per coulomb?

a)

Volt

b)

Watt

c)

Ampere

d)

Kilometer

8.

With the knowledge that $R_1>R_2>R_3$ , what can we say about $R_{total}$ ?

a)

$R_{total}=R_1+R_2+R_3$

b)

$R_{total}=R_1=R_2=R_3$

c)

$R_{total}>R_1$

d)

$R_{total}<R_3$

9.

Do we have our calculators out + math brains on

a)

Yes

b)

No

c)

I do now!!!

d)

$R=\frac{V}{I}$

10.

Soha creates a circuit with current = 5.0 A and two 3.5 V batteries connected in series. What is its total resistance?

a)

1.4 ohms

b)

0.70 ohms

c)

0.7000 ohms

d)

35 ohms

11.

Charles spends 4.00 hours playing video games on Monday instead of studying. If his computer uses 0.500 kW of power and generates 2000.0 kJ of useful output, how efficient was his gaming?

a)

27.8%

b)

72.2%

c)

60.0%

d)

13.9%

12.

Oliver constructs a circuit using a 5.00 V battery and two 6.00 ohm resistors connected in parallel. What is the total current of this circuit?

a)

1.83 A

b)

0.83 A

c)

1.67 A

d)

1.20 A

13.

Julia uses her 1.80 kW dishwasher for two consecutive 90.0-minute cycles. If energy costs 15.1 cents per kilowatt-hour, how much money did this cost Julia?

a)

15.1 cents

b)

45.3 cents

c)

81.5 cents

d)

27.2 cents

14.

Jianne connects a 10.0 ohm resistor to an 8.00 V battery. She then connects a lightbulb and an ammeter to this circuit in series and sees a value of 0.500 A. What is the bulb's resistance?

a)

6.00 ohms

b)

6 ohms

c)

16.00 ohms

d)

16 ohms

15.

Sebastian cannot remember how he connected his 3 resistors (3.00 ohms, 5.00 ohms, 8.00 ohms) to a 7.00 volt battery, but he knows the circuit's total current was 1.75 A. How were the resistors connected?

a)

All three were in series

b)

All three were in parallel

c)

The 3 and 5 ohm resistors were connected in series, with the 8 ohm one in parallel

d)

The 3 and 8 ohm resistors were connected in series, with the 5 ohm one in parallel

Grade 9 Dynamic Electricity!

Total questions: 15

Worksheet time: 10mins

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