Ujian Ulang - ASAT - Physics - Kelas 9 - 2023-2024

What is this ray diagram for?

• concave

• convex

• flat

• window

What is the name of this device used to detect charge?

• Beaker

• Electroscope

• generator van de Graaff

• chargometer

A plastic rod and a dry cloth are uncharged. The rod is now rubbed with the cloth and both become charged. The rod becomes negatively charged because some charged particles move from the cloth to the rod. What is the charge on the cloth and which particles move in the charging process?

• negative, electron

• negative, neutron

• positive, electron

• positive, neutron

Two balloons, X and Y, are suspended by insulated strings. They are each held near negatively charged balloons. The balloons hang as shown. What is the charge on balloon X and what is the charge on balloon Y?

• X = negative, Y = negative

• X = negative, Y = positive

• X = positive, Y = negative

• X = positive, Y = positive

A wire has a certain electrical resistance. The diameter and length of the wire can be changed. Which pair of changes should cause the wire's resistance to increase?

• diameter decreases, length decreases

• diameter decreases, length increases

• diameter increases, length decreases

• diameter increases, length increases

A simple circuit has a current of 3.0 A and a resistance of 5.0 Ohm. What is the voltage supplied by the battery in this circuit?

• 15 volt

• 1.6 volt

• 2 volt

• 0.6 volt

What is the purpose of a fuse in an electrical circuit?

• to connect the metal casing of the equipment to the ground

• to disconnect the current in case of overload

• to reduce voltage

• to increase current

This diagram shows two resistors connected in a circuit. What is the combined resistance of this resistor arrangement?

• 4 ohms

• 6 ohms

• 9 ohms

• 18 ohms

Why are lights in a house lighting circuit connected in parallel rather than in series?

• If one light bulb goes out, the others become brighter.

• Less current is drawn from the power source.

• The light bulbs can be turned off independently using a switch.

• When more light bulbs are added, their brightness decreases.

A student arranges the circuit shown. The switch is in the off position. Which light is on and which lights are off?

• X off, Y off, Z off

• X off, Y on, Z off

• X on, Y off, Z on

• X on, Y on, Z on