SPM Physics light/electricity/electronic

In which circuit will the bulb light up when switch S is closed?

Dalam litar manakah mentol akan menyala apabila suis S ditutup?

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Diagram shows the depletion layer of a p-n junction diode. Which statement explains the situation?

Rajah menunjukkan satu simpang p-n diod. Pernyataan manakah yang menerangkan situasi itu?

• Diode is in forward-bias

  Diod adalah dalam pincang ke depan

• It is in reverse bias

  Diod adalah dalam pincang songsang

• The depletion layer becomes wider

  Lapisan susutan menjadi lebar

• Electrons and holes are pulled away from the p-n junction

  Elektron dan lohong ditarik menjauhi simpang p-n

Diagram shows a transistor switching circuit with a light dependent resistor. The bulb will light up when

Rajah menunjukkan litar pensuisan transistor dengan sebuah perintang peka cahaya. Mentol akan menyala apabila

• surrounding is dark

  persekitaran adalah gelap

• the surrounding is bright

  persekitaran adalah terang

• the resistor R1 is disconnected

  perintang R1 ditanggalkan

• the terminals of the battery are reversed

  apabila terminal bateri disongsangkan

Diagram shows a transistor circuit with a thermistor and a light bulb. What happens to the resistance of the thermistor and the light bulb when the temperature of the surrounding is high?

Rajah menunjukkan suatu litar transistor dengan sebuah termistor dan mentol. Apakah yang berlaku kepada rintangan termistor dan mentol itu apabila suhu sekeliling adalah tinggi?

• Resistance of thermistor high, bulb lights up.

  Rintangan termistor adalah tinggi, mentol bernyala.

• Resistance of thermistor high, bulb does not light up.

  Rintangan termistor adalah tinggi, mentol tidak bernyala.

• Resistance of thermistor low, bulb lights up.

  Rintangan termistor adalah rendah, mentol bernyala.

• Resistance of thermistor low, bulb does not light up.

  Rintangan termistor adalah rendah, mentol tidak bernyala.

Diagram shows the trace displayed on the screen of a cathode ray oscilloscope. Which diagram shows the correct trace when the time-based switch is off?

Rajah menunjukkan surihan pada skrin sebuah osiloskop sinar katod. Rajah manakah menunjukkan surihan yang betul apabila suis asas masa dimatikan?

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Diagram shows a logic gate circuit with input signals P and Q. Which diagram shows the output signal X?

Rajah menunjukkan litar get logik dengan isyarat input P dan Q. Rajah manakah yang menunjukkan isyarat output X yang betul?

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Diagram shows a circuit with the output displayed on the CRO screen. Which diagram show circuit X?

Rajah menunjukkan satu litar dengan output yang dipaparkan pada skrin OSK. Rajah manakah menunjukkan litar X?

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R1 and R2 both have the resistance of 6 Ohms. What is the total effective resistance of the resistors?

• 2 ohm

• 3 ohms

• 6 ohms

• 12 ohms

Two identical lamps, L1 & L2, are connected to a constant voltage power supply. The voltage drop across L1 is 36V. What is the voltage of the power supply?

• 18V
• 36V
• 6V
• 72V

Which of the following statements is false about electric field lines

• electric field lines cannot cross
• electric field lines point away from positive charge
• electric field lines are always straight lines
• electric field lines show how a proton would move in an electric field