06-10-2017, 12:20 AM
How tuning fork vibrate explains its mechanism & explains melde experiment principles
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melde experiment viva question
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How tuning fork vibrate explains its mechanism & explains melde experiment principles
17-10-2017, 12:11 PM
Q.1: What is meant by electric current?
Ans. The flow of electrons.
Q.2: What are A.C. currents? and D.C.?
Ans. The alternating current (A.C.) changes its direction with a defined frequency. Direct current (D.C.) flows in only one direction.
Q.3: What is meant by frequency?
Ans. Number of vibrations per second.
Q.4: What is the frequency of A.C. in Nepal?
Ans. 50 cycles / sec.
Q.5: What types of waves are produced in the wire?
Ans. Transverse stationary waves.
Q.6: What kind of vibrations occur in the thread?
Ans. Forced vibrations.
Q.7: If the voltage (T or Mg) increases four times, what will be the effect on the length of a cycle?
Ans. The ratio f = (1 / 2l) √Mg / m shows that the length of the cycle (l) will increase twice.
Q.8: What will happen if the D.C. current?
Ans. The rod will not vibrate because the soft iron part will magnetize only in one direction.
Q.9: What is the frequency of D.C.?
Ans. Zero.
Q.10: Why does the bar vibrate?
Ans. The magnetic field produced by the soft iron strip reverses its direction 50 times in every second.
Q.11: What is the function of the bulb?
Ans. Shows that current flows in the circuit.
Q.12: If the iron rod is replaced by a copper rod, will the rod vibrate?
Ans. No, copper is not attracted to a magnet.
Q.13: What is the relationship between the frequency of the iron strip and the frequency of the waves in the string in the Melde apparatus?
Ans. The frequency of the iron strip is equal to the frequency of the waves in the string.
Q.14: What is the solenoid?
Ans. A solenoid is a coil of wire wound uniformly in the cylinder having a length that is large in comparison to its radius. A uniform magnetic field is produced within the coil, parallel to its axis, when continuous direct current passes through it.
Q.15: What do you mean by stationary or stationary waves?
Ans. When two exactly equal waves (the same amplitude, frequency and period of time) traveling in opposite directions with equal velocity overlap each other in a confined medium (eg a tube), the resultant wave obtained is called a stationary or stationary wave .
Ans. The flow of electrons.
Q.2: What are A.C. currents? and D.C.?
Ans. The alternating current (A.C.) changes its direction with a defined frequency. Direct current (D.C.) flows in only one direction.
Q.3: What is meant by frequency?
Ans. Number of vibrations per second.
Q.4: What is the frequency of A.C. in Nepal?
Ans. 50 cycles / sec.
Q.5: What types of waves are produced in the wire?
Ans. Transverse stationary waves.
Q.6: What kind of vibrations occur in the thread?
Ans. Forced vibrations.
Q.7: If the voltage (T or Mg) increases four times, what will be the effect on the length of a cycle?
Ans. The ratio f = (1 / 2l) √Mg / m shows that the length of the cycle (l) will increase twice.
Q.8: What will happen if the D.C. current?
Ans. The rod will not vibrate because the soft iron part will magnetize only in one direction.
Q.9: What is the frequency of D.C.?
Ans. Zero.
Q.10: Why does the bar vibrate?
Ans. The magnetic field produced by the soft iron strip reverses its direction 50 times in every second.
Q.11: What is the function of the bulb?
Ans. Shows that current flows in the circuit.
Q.12: If the iron rod is replaced by a copper rod, will the rod vibrate?
Ans. No, copper is not attracted to a magnet.
Q.13: What is the relationship between the frequency of the iron strip and the frequency of the waves in the string in the Melde apparatus?
Ans. The frequency of the iron strip is equal to the frequency of the waves in the string.
Q.14: What is the solenoid?
Ans. A solenoid is a coil of wire wound uniformly in the cylinder having a length that is large in comparison to its radius. A uniform magnetic field is produced within the coil, parallel to its axis, when continuous direct current passes through it.
Q.15: What do you mean by stationary or stationary waves?
Ans. When two exactly equal waves (the same amplitude, frequency and period of time) traveling in opposite directions with equal velocity overlap each other in a confined medium (eg a tube), the resultant wave obtained is called a stationary or stationary wave .
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