Question 61
What is the standard unit of electric current in the International System of Units (SI)?ElectricityElectricityeasy
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Question 62
A car accelerates from rest to 20 m/s in 5 seconds. What is its acceleration?MechanicsMechanicseasy
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Question 63
What is the main reason a metal rod expands when heated?HeatHeatmedium
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Question 64
A wave has a frequency of 500 Hz and a wavelength of 0.6 m. What is its speed?WavesWavesmedium
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Question 65
In a simple series circuit with a battery and two identical resistors, how does the total resistance compare to a single resistor?ElectricityElectricitymedium
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Question 66
Which statement correctly describes the magnetic field around a current-carrying conductor?MagnetismMagnetismmedium
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Question 67
What phenomenon explains the photoelectric effect observed in metals?Modern physicsModern physicshard
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Question 68
A 2 kg object is lifted to a height of 5 m. What is its gravitational potential energy? (g = 10 m/s²)EnergyEnergyeasy
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Question 69
Which condition is necessary for total internal reflection to occur?WavesWaveshard
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Question 70
Which instrument is best suited for measuring the length of a pencil to the nearest millimeter?MeasurementsMeasurementseasy
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